Returns this DateTime value in the UTC time zone.
Returns this if it is already in UTC. Otherwise this method is equivalent to:
new DateTime.fromMicrosecondsSinceEpoch(microsecondsSinceEpoch, isUtc: true)
DateTime toUtc() { if (isUtc) return this; return DateTime._withValue(_value, isUtc: true); }
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-core/DateTime/toUtc.html